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Prep4USMLE » USMLE Step 1 Forum » Physiology Forum » Comments on hyponatremia


 hyponatremia  



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bluestar

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Topics: 236
Posts: 724
Aug 24, 2004 - 1:22 PM       #1

how much sodium is needed per day for normal functioning? How can diet restriction of sodium cause hyponatremia?


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bluedusk

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Topics: 35
Posts: 217
Aug 25, 2004 - 9:36 PM       #2

200-500 mg is the recommended amount, although as you know, you can renally resorb enough to drive it lower (calculate GFR over a day x conc. x % resorbed for ballpark absolute minimum).

i assume diet restriction of sodium, with regular water intake, gives you a dilutional hyponatremia not unlike sweating and drinking pure water, although it seems more difficult to achieve.





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